1//===-- Unittests for islower----------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "src/ctype/islower.h"
10#include "test/UnitTest/Test.h"
11
12TEST(LlvmLibcIsLower, DefaultLocale) {
13 // Loops through all characters, verifying that lowercase letters
14 // return a non-zero integer and everything else returns zero.
15 for (int ch = -255; ch < 255; ++ch) {
16 if ('a' <= ch && ch <= 'z')
17 EXPECT_NE(LIBC_NAMESPACE::islower(ch), 0);
18 else
19 EXPECT_EQ(LIBC_NAMESPACE::islower(ch), 0);
20 }
21}
22

source code of libc/test/src/ctype/islower_test.cpp